3ds Max 2017 SP3 isn’t importing CATproducts.
File > Import > Select file > Open.
Then an import settings dialog box pops up. (Side bar: I see this import settings dialog when I import CGR’s but I don’t recall seeing it for CATproducts).
I hit okay and … nothing. The dialog immediately blinks out and 3ds Max immediately goes back to a blank seen.
Usually there is a big dialog with progress bars.
But not now. It’s just… nothing.